relationships with some of the most extraordinary people i've ever met. >> some of those people are the wounded warriors who sacrificed so much for this country n past decade alone, almost 50,000 service men and women have been physically injured in afghanistan and iraq. >> sargeant keys became a triple amputee in afghanistan. >> this is my first run. i have my legs and my arms on i'm go owing do the best to try to walk it. >> adam put on his prosthetic and walked three and a half miles on those prosthetics through the tunnel. it took him:kaajú long time, but he is one of the guys who is just, if he says he's going to do something, he's not going to stop. he went all the way. >> 30,000 people ran, walked, through the tunnel that day. >> this is a fantastic day.